White dust, crusty deposits on furnace humidifier


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Old 03-29-17, 08:32 PM
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White dust, crusty deposits on furnace humidifier

Hello,

I have a pad-style, whole-house furnace humidifier.

Whenever I install a new filter, a white crust forms on the filter within a month or so.

How can I prevent this?

Right now the water supply is from the hot side of the hot water tank. I have a water softener, too.

I was considering an inline scale inhibitor filter, but would that make any difference because I already have soft water?

Thanks!
Joe
 
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Old 03-30-17, 01:24 AM
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That is mineral deposits from the water, I get that also.

Right now the water supply is from the hot side of the hot water tank. I have a water softener, too.
You have a softener so your minimizing the calcium, but there is still some there.

Supply from the hot water heater?

Should not be causing any issue but I have never seen a humidifier plumbed that way!
 
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Old 03-30-17, 04:30 AM
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I always plumb to the hot side. Makes the humidifier more efficient.
 
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Old 03-30-17, 04:48 AM
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Yes, I have the same situation. Mine is also tapped from the hot water side. I just replace the media on a once year time table just before the heating season.
 
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Old 03-30-17, 05:52 AM
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As others have said the white is mineral deposits. The only true way to stop the deposits is to use distilled or highly filtered water (without the mineras) in the humidifier. There are filters that will remove the minerals but that opens a whole other area of maintenance. Generally replacing the pads in the humidifier is the easier and cheaper solution.
 
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Old 03-30-17, 08:10 AM
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I always plumb to the hot side. Makes the humidifier more efficient.
How so, water in line would cool down or heat up if cold to room temp?
 
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Old 03-31-17, 04:36 AM
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cool down yes except for high demand unless hook up is far away. Plus water heater should help particulate settle out of water more.
 
 

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